4.
Why do we need Computers?• Get more work done• Get work done faster• Get more complex work done Debasis Das 4

5.
How Do Computers Do it?• Are they more intelligent?• They work unimaginably fast• They are able to take simple logical decisions• They don’t get tired• They don’t need a break• They don’t fall sick (usually) Debasis Das 5

10.
Basic Cycle 1. Get next instruction 4. Get operation done Mindless List But Of Faithful Temp Instructions clerk storage 2. Make out What is to be Done. 3. Get operandsIn Von Neumann Stored memory architecture 5. StoreThe instructions, operands, temporary and final results results are in same memory. Debasis Das 10

50.
Spreadsheet• Table based calculations made possible• Data is arranged in rows and columns• Rows and columns can be related through embedded formula• What-if scenarios can be studies, as data changes in the main set will automatically generate data in other cells Debasis Das 50

51.
Presentation• Electronic equivalent of flip chart presentation• Slides could be created and presented one by one• Each slide, like flip carts can have text and graphics• Automatic shows can be created Debasis Das 51

52.
Database Management Systems• Large amount of tabular data can be created• In the relational database version one such table may be related to another one• Many such databases could be created within a DBMS Debasis Das 52